Raw Material

Your Professional Tantalum Niobium Raw Material Manufacturer!

Shaanxi Zhongheng Weichuang Metal Materials Co., Ltd. is located in the High-tech Development Zone of Baoji City, Shaanxi Province. Its main products include conventional processed profiles and deep-processed products such as tantalum, niobium, titanium, zirconium, nickel, vanadium and their alloys. The company's products are widely used in many fields such as electronics industry, metallurgy industry, chemical industry, aerospace, biomedical engineering and superconducting industry.

Why Choose Us

01/

Professional Team
Our company boasts an experienced and highly skilled professional team. Leveraging years of accumulated technical expertise and a pool of high-caliber talent, we are committed to providing customers with timely, efficient, and comprehensive after-sales service.

02/

Quality Control
We specialize in the export of metal materials. We maintain strict control over every stage, from raw material smelting to finished product export, to ensure the selection of high-quality metal materials and to meet the highest standards at every step.

03/

Qualification Certification
We have obtained ISO9001 quality management system certification, ensuring that our product quality and service levels adhere to international standards.

04/

Sales Market
Our products are primarily exported to North America, Europe, and Asia, and we have established a robust international market network.

Our Best-Selling Tantalum Niobium Raw Material Products

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Melting Niobium

Melting niobium usually refers to the liquid or semi-solid form of niobium metal or niobium alloy obtained through the melting process, or the intermediate product formed after the initial cooling of this liquid metal. At this stage, smelting niobium may require further processing or treatment, such as casting, forging, or rolling, to form the final niobium product. Niobium ingot is a block shaped product formed by melting niobium, cooling and solidifying it.

Tantalum Block For Melting

Tantalum block for smelting is a block of tantalum material specifically used in the smelting process. Tantalum is a metal with a high melting point, high hardness, and high corrosion resistance, with a melting point of around 3000 ° C, making it very suitable for high-temperature melting environments.
In the preparation method of tantalum blocks, from the extraction of tantalum ore to the final formation of tantalum blocks, it covers multiple stages such as smelting, refining, and processing.

Niobium Particles

Niobium particles are a solid particle form of metallic niobium, whose properties are mainly derived from the physical and chemical properties of metallic niobium. Niobium is an important microalloying element in steel. Adding a small amount of niobium can significantly improve the properties of steel, such as increasing its strength, toughness, high temperature oxidation resistance, and corrosion resistance, reducing its brittle transition temperature, and making it have good welding and forming properties.

Niobium Strip

Niobium strip is a gray white, tough, and malleable refractory metal with high melting point (2468 ℃) and boiling point (4742 ℃). It has good thermal and electrical conductivity, as well as high resistance to deformation and corrosion. Niobium has stable chemical properties and forms a dense oxide film on its surface at room temperature, preventing further oxidation.

Facts About Tantalum Raw Materials

Atomic number	73
CAS number	7440-25-7
Atomic mass	180.95 [g/mol]
Melting point	2996 °C
Boiling point	5458 °C
Density at 20 °C	16.65 [g/cm³]
Crystal structure	Body-centered cubic
Coefficient of linear thermal expansion at 20 °C	6.4 × 10^-6 [m/(mK)]
Thermal conductivity at 20 °C	57.5 [W/(mK)]
Specific heat at 20 °C	0.14 [J/(gK)]
Electrical conductivity at 20 °C	8.0 × 10⁶ [S/m]
Specific electrical resistance at 20 °C	0.125 [(Ωmm²)/m]

Manufacturing Process of Tantalum

Tantalum is a dark blue-gray metal that is hard, dense, and ductile. It is also easily fabricated, highly conductive to electricity and heat, and exceptionally resistant to corrosion.

Separation:

Since tantalum is often found with niobium, it must undergo a separation process before it can be further refined and used. This process involves treating the ore with a mixture of hydrofluoric acid and sulfuric acid at elevated temperatures, which dissolves the tantalum and niobium into complex fluorides.

Conversion:

The purified tantalum solution can be turned into tantalum oxide (Ta2O5) or potassium tantalum fluoride (K2TaF7) as needed.

Purification:

Since other elements are generally present within the ore, the slurry is first filtered and then further processed using a solvent extraction process that uses methyl isobutyl ketone or a liquid ion exchange process that uses an amine extractant in kerosene. The result is a highly purified solution of tantalum.

Metal Production:

The final step is to convert the tantalum compound into pure tantalum metal using an electrolytic or chemical reduction process.

Applications of Tantalum

● Arc-welding rods for stabilized grades of stainless steel
● Nuclear reactor control rod due to its high temperature and corrosion resistance, and low neutron absorption at cross-section
● Crucibles for synthetic diamond manufacturing
● Sodium vapor lamb, and LCD back lighting
● Jewelry: Brilliant colors can be created on niobium surface
● Superconductor, supercollider and particle accelerator using ultra-high purity metals and alloys
● Optical coating and camera lens
● Lithium niobite for wave guide in communications
● Thin film solar cell

Niobium Characteristics

Chemical Properties

Chemical Data
CAS number	7440-03-1
Thermal neutron cross section	1.1 barns/atom
Ionic radius	0.7 Å
Electro negativity	1.6
Electrochemical equivalent	0.0693 g/A/h

Physical Properties

Properties	Metric	Imperial
Density	8.4 g/cm³	0.303 lb/in³
Melting point	2410 °C	4370 °F
Boiling point	5100 °C	9212°F

Mechanical Properties

Properties	Metric	Imperial
Tensile strength (at room temperature)	275 MPa	40 ksi
Modulus of elasticity	105 GPa	15250 ksi
Shear modulus	38 GPa	5511 ksi
Poissons Ratio	0.4	0.4
Hardness, Brinell	736	736
Hardness, Vickers	1320	1320
Hardness, Mohs	6	6

Thermal Properties

Properties	Metric	Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F)	7.3 µm/m°C	4 µin/in°F
Thermal conductivity	53.7 W/mK	1133 BTU in/hr.ft².°F

Manufacturing Process of Niobium

Niobium—initially known as columbium—is a lustrous gray metal with a high melting point and low density. It is highly ductile and superconductive.
There are two main processes used for niobium production. They are utilized depending on whether pyrochlore or columbite and tantalum-bearing ores are being processed.

Pyrochlore Ores:

These ores undergo a process that converts the niobium oxide into HSLA ferroniobium. The conversion is performed either through an aluminothermic reduction process or by reduction in an electric arc furnace.

Columbite and Tantalum-bearing Ores:

These ores undergo the same chemical process outlined in the Tantalum section. Typically, ammonia is introduced to the purified solution of niobium to convert it into niobium hydroxide. The resulting compound is then washed, filtered, and calcined.

Metal Production:

The calcined niobium hydroxide is then reduced to pure niobium metal using an electrolytic or chemical reduction process.

Applications of Niobium

● Medical devices
● Nuclear energy
● Aerospace
● Surgical implants
● Electronics
● Optical lenses
● Chemical industry
● Particle accelerators (CERN)

Packing

We will be carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.

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FAQ

Q: Why is tantalum so valuable?

A: Tantalum is an element that is crucial for technology. Its primary use is as a capacitor or resistor in a variety of electronic equipment, such as computers, cell phones, and medical devices. Tantalum is also used as a metal alloy to improve strength, ductility, and to increase corrosion and heat resistance.

Q: What is tantalum used for?

A: One of the main uses of tantalum is in the production of electronic components. An oxide layer which forms on the surface of tantalum can act as an insulating (dielectric) layer. Because tantalum can be used to coat other metals with a very thin layer, a high capacitance can be achieved in a small volume.

Q: Is tantalum stronger than steel?

A: Tantalum requires no such metallurgical shoring-up of weaknesses. In pure elemental form, it boasts a hardness of 200 Vickers and a tensile strength of 900 MPa, making it just as hard and almost twice as strong as the best steels. In addition to this, tantalum is practically immune to all forms of corrosion.

Q: What is niobium used for?

A: Niobium is used in alloys including stainless steel. It improves the strength of the alloys, particularly at low temperatures. Alloys containing niobium are used in jet engines and rockets, beams and girders for buildings and oil rigs, and oil and gas pipelines. This element also has superconducting properties.

Q: Does melting niobium react with anything?

A: It has a body-centered cubic crystalline structure and in its physical and chemical properties it resembles tantalum. It must be placed in a protective atmosphere when processed at even moderate temperatures because it tends to react with oxygen, carbon, the halogens, nitrogen, and sulfur.

Q: Do you know what melting niobium is?

A: Niobium is a chemical element found in columbite and pyrochlore minerals. It was once known as columbium and is a transition metal like tantalum. Niobium has the symbol Nb (previously Cb) and the atomic number 41. The soft, grey, crystalline element is a ductile transition metal that resists heat and wear. Niobium is used in steel for gas pipelines and jet and rocket engines.

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